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60 Ways Farmers Can Protect  Surface Water
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54. Determine The Soil-pesticide Interaction Rating

flooded field

Once you know your soil's potential for surface runoff and your pesticide's potential for runoff, you are ready to put the pieces of information together.

You are ready to determine the soil-pesticide interaction rating for runoff.

flooded field You should know whether your soil has a high, intermediate, or low potential for runoff. You should also know whether your pesticide has a large, medium, or small potential for both runoff adsorption losses and runoff solution losses.
soil-pesticide interaction ratings for both adsorption and solution losses To see how these factors interact, you can use this chart to determine the soil-pesticide interaction ratings for both adsorption and solution losses. Keep in mind that this procedure can only estimate the relative risk that a particular pesticide will move with runoff water. Therefore, view it as a general guide, rather than as a precise tool for predicting runoff risks.
Potential 1 If you find that your soil-pesticide combination falls under potential 1, that means the pesticide has a high probability of being lost in surface runoff. Consider using another pesticide or a nonchemical pest management technique.
Potential 2 If you find that your soil-pesticide combination falls under potential 2, that means the pesticide has a moderate probability of being lost in surface runoff. Where the hazards to humans, plants, and animals are too great, select a pesticide with a better surface runoff rating, use a nonchemical pest management technique, or change the application rating to improve the rating.
Potential 3 If you find that your soil-pesticide combination falls under potential 3, that means the pesticide has a low probability of being lost in surface runoff.
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